Adam Thielen paid homage to the late Norm McDonald in a big way Sunday ... by rockin' a pair of amazing "Turd Ferguson" tribute cleats during the Vikings vs. Browns game.
The NFL star got the custom spikes made by celeb shoe artist Mache -- and they're awesome, with one featuring an image of McDonald from his famous "Celebrity Jeopardy!" skits on "Saturday Night Live."
The yellow and white shoes also had the quote, "Yeah that's right. It's a funny name" written next to a script "Turd Ferguson.